Flock 1b-28

Flock-1 represents a constellation of three-unit CubeSats operated by Planet Labs to build an Earth-observation constellation based on CubeSats. The satellites were first released from ISS in February 2014 to start orbiting Earth for several months, acquiring images of chosen ground targets. >>>Detailed Overview

The MicroMAS-1 satellite, short for Micro-sized
Microwave Atmospheric Satellite-1, is a 3U CubeSat project of the MIT/LL
(Massachusetts Institute of Technology/Lincoln Laboratory), MIT/SSL
(Space Systems Laboratory) and the University of Massachusetts at
Amherst. Micro-MAS carries a
nine-channel passive microwave radiometer to demonstrate miniaturized
radiometer technology in space for application in ultra-compact
spacecraft systems such as a high-performance multi-band sounder for
future weather satellites.

The low-cost, mission-flexible
Micro-MAS bus could find use in the development of a constellation of
radiometer satellites that could provide near-continuous coverage. A
continuous coverage would be desired as the current coverage using
high-cost platforms has a longer revisit time leading to gaps in data
during which rapid changes in storms can be missed.